460
11054A–ATARM–27-Jul-11
SAM9X25
460
11054A–ATARM–27-Jul-11
SAM9X25
30.7.6
DDRSDRC Timing Parameter 2 Register
Name:
DDRSDRC_TPR2
Address:
0xFFFFE814
Access:
Read-write
Reset:
This register can only be written if the bit WPEN is cleared in
“DDRSDRC Write Protect Mode Register” on page 466
• TXARD: Exit Active Power Down Delay to Read Command in Mode “Fast Exit”.
The Reset Value is 2 cycles.
This field defines the delay between cke set high and a Read Command in number of cycles. Number of cycles is between
0 and 15.
Note: This field is found only in DDR2-SDRAM devices
.
• TXARDS: Exit Active Power Down Delay to Read Command in Mode “Slow Exit”.
The Reset Value is 6 cycles.
This field defines the delay between cke set high and a Read Command in number of cycles. Number of cycles is between
0 and 15.
Note: This field is found only in DDR2-SDRAM devices
.
• TRPA: Row Precharge All Delay
The Reset Value is 0 cycle.
This field defines the delay between a Precharge ALL banks Command and another command in number of cycles. Num-
ber of cycles is between 0 and 15.
Note: This field is found only in DDR2-SDRAM devices
.
• TRTP: Read to Precharge
The Reset Value is 2 cycles.
This field defines the delay between Read Command and a Precharge command in number of cycle.
Number of cycles is between 0 and 7.
• TFAW: Four Active window
The Reset Value is 4 cycles.
DDR2 devices with 8-banks (1Gb or larger) have an additional requirement: t
FAW
. This requires that no more than four
ACTIVATE commands may be issued in any given t
FAW
(MIN) period.
Number of cycles is between 0 and 15.
Note: This field is found only in DDR-SDRAM 2 devices with eight internal banks
31
30
29
28
27
26
25
24
–
–
–
–
–
–
–
–
23
22
21
20
19
18
17
16
–
–
–
–
TFAW
15
14
13
12
11
10
9
8
TRTP
TRPA
7
6
5
4
3
2
1
0
TXARDS
TXARD
Содержание SAM9X25
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Страница 330: ...330 11054A ATARM 27 Jul 11 SAM9X25 330 11054A ATARM 27 Jul 11 SAM9X25...
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Страница 468: ...468 11054A ATARM 27 Jul 11 SAM9X25 468 11054A ATARM 27 Jul 11 SAM9X25...
Страница 532: ...532 11054A ATARM 27 Jul 11 SAM9X25 532 11054A ATARM 27 Jul 11 SAM9X25...
Страница 692: ...692 11054A ATARM 27 Jul 11 SAM9X25 692 11054A ATARM 27 Jul 11 SAM9X25...
Страница 777: ...777 11054A ATARM 27 Jul 11 SAM9X25 777 11054A ATARM 27 Jul 11 SAM9X25...
Страница 886: ...886 11054A ATARM 27 Jul 11 SAM9X25 886 11054A ATARM 27 Jul 11 SAM9X25...
Страница 962: ...962 11054A ATARM 27 Jul 11 SAM9X25 962 11054A ATARM 27 Jul 11 SAM9X25...
Страница 1036: ...1036 11054A ATARM 27 Jul 11 SAM9X25 1036 11054A ATARM 27 Jul 11 SAM9X25...
Страница 1067: ...1067 11054A ATARM 27 Jul 11 SAM9X25 1067 11054A ATARM 27 Jul 11 SAM9X25 PTZ Pause Time Zero Enable pause time zero interrupt...
Страница 1069: ...1069 11054A ATARM 27 Jul 11 SAM9X25 1069 11054A ATARM 27 Jul 11 SAM9X25 PTZ Pause Time Zero Disable pause time zero interrupt...
Страница 1071: ...1071 11054A ATARM 27 Jul 11 SAM9X25 1071 11054A ATARM 27 Jul 11 SAM9X25 PTZ Pause Time Zero Pause time zero interrupt masked...
Страница 1128: ...1128 11054A ATARM 27 Jul 11 SAM9X25 1128 11054A ATARM 27 Jul 11 SAM9X25...
Страница 1130: ...1130 11054A ATARM 27 Jul 11 SAM9X25...
Страница 1131: ...1131 11054A ATARM 27 Jul 11 SAM9X25 Revision History Doc Rev 11054A Comments Change Request Ref 1st issue...
Страница 1132: ...1132 11054A ATARM 27 Jul 11 SAM9X25...
Страница 1144: ...xii 11054A ATARM 27 Jul 11 SAM9X25...